MAX9939 Maxim, MAX9939 Datasheet - Page 11

• Manufacturer Part Number: MAX9939
• Description: The MAX9939 is a general-purpose, differential-input programmable-gain amplifier (PGA) that is ideal for conditioning a variety of wide dynamic range signals such as those found in motor current-sense, medical instrumentation, and sonar data acquisit
• Manufacturer: Maxim

Figure 3. Using the MAX9939 Output Amplifier as an Anti-Aliasing Filter (Corner Frequency = 1.3kHz) to Maximize Nyquist Bandwidth
INA+
INA-
MAX9939
10kΩ
10kΩ
GAIN
______________________________________________________________________________________
with Input V
SCLK
SPI REGISTERS
OFFSET-
VOLTAGE
INPUT
TRIM
DIN
10kΩ
SHUTDOWN
LVL
CS
SPI Programmable-Gain Amplifier
V
CC
V
20kΩ
20kΩ
CC
/2
R
I
V
CC
0.1µF
OS
20kΩ
20kΩ
V
CC
R
GND
A
F
V
Trim and Output Op Amp
CC
/2
1µF
V
B
CC
V
20kΩ
20kΩ
CC
/2
OUTA
INB
OUTB
220pF
121kΩ
66.5kΩ
66.5kΩ
4.7nF
1.21kΩ
100nF
CS
DOUT
SCLK
ADC
ASIC
11